65606657401 has 4 divisors (see below), whose sum is σ = 65610178704. Its totient is φ = 65603136100.

The previous prime is 65606657393. The next prime is 65606657429. The reversal of 65606657401 is 10475660656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65606657401 - 2³ = 65606657393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65606657201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1732555 + ... + 1770016.

It is an arithmetic number, because the mean of its divisors is an integer number (16402544676).

Almost surely, 2^65606657401 is an apocalyptic number.

It is an amenable number.

65606657401 is a deficient number, since it is larger than the sum of its proper divisors (3521303).

65606657401 is a wasteful number, since it uses less digits than its factorization.

65606657401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521302.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 65606657401 in words is "sixty-five billion, six hundred six million, six hundred fifty-seven thousand, four hundred one".